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<a name="GdkGLContext"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="GdkGLContext.top_of_page"></a>GdkGLContext</span></h2>
<p>GdkGLContext — OpenGL context</p>
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<div class="refsect1">
<a name="GdkGLContext.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="returnvalue">GdkDisplay</span></a> *
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-display" title="gdk_gl_context_get_display ()">gdk_gl_context_get_display</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gdk3-Windows.html#GdkWindow"><span class="returnvalue">GdkWindow</span></a> *
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-window" title="gdk_gl_context_get_window ()">gdk_gl_context_get_window</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="returnvalue">GdkGLContext</span></a> *
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-shared-context" title="gdk_gl_context_get_shared_context ()">gdk_gl_context_get_shared_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-version" title="gdk_gl_context_get_version ()">gdk_gl_context_get_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-set-required-version" title="gdk_gl_context_set_required_version ()">gdk_gl_context_set_required_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-required-version" title="gdk_gl_context_get_required_version ()">gdk_gl_context_get_required_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-set-debug-enabled" title="gdk_gl_context_set_debug_enabled ()">gdk_gl_context_set_debug_enabled</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-debug-enabled" title="gdk_gl_context_get_debug_enabled ()">gdk_gl_context_get_debug_enabled</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-set-forward-compatible" title="gdk_gl_context_set_forward_compatible ()">gdk_gl_context_set_forward_compatible</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-forward-compatible" title="gdk_gl_context_get_forward_compatible ()">gdk_gl_context_get_forward_compatible</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-set-use-es" title="gdk_gl_context_set_use_es ()">gdk_gl_context_set_use_es</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-use-es" title="gdk_gl_context_get_use_es ()">gdk_gl_context_get_use_es</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-is-legacy" title="gdk_gl_context_is_legacy ()">gdk_gl_context_is_legacy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-realize" title="gdk_gl_context_realize ()">gdk_gl_context_realize</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-make-current" title="gdk_gl_context_make_current ()">gdk_gl_context_make_current</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="returnvalue">GdkGLContext</span></a> *
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-current" title="gdk_gl_context_get_current ()">gdk_gl_context_get_current</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GdkGLContext.html#gdk-gl-context-clear-current" title="gdk_gl_context_clear_current ()">gdk_gl_context_clear_current</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GdkGLContext.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type">
<a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="type">GdkDisplay</span></a> *</td>
<td class="property_name"><a class="link" href="GdkGLContext.html#GdkGLContext--display" title="The “display” property">display</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *</td>
<td class="property_name"><a class="link" href="GdkGLContext.html#GdkGLContext--shared-context" title="The “shared-context” property">shared-context</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> *</td>
<td class="property_name"><a class="link" href="GdkGLContext.html#GdkGLContext--window" title="The “window” property">window</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GdkGLContext.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="other_proto_type">
<col class="other_proto_name">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="GdkGLContext.html#GdkGLContext-struct" title="GdkGLContext">GdkGLContext</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GdkGLContext.html#GdkGLError" title="enum GdkGLError">GdkGLError</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GdkGLContext.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> GdkGLContext
</pre>
</div>
<div class="refsect1">
<a name="GdkGLContext.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gdk/gdkwayland.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GdkGLContext.description"></a><h2>Description</h2>
<p><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is an object representing the platform-specific
OpenGL drawing context.</p>
<p><a href="GdkGLContext.html#GdkGLContext-struct"><span class="type">GdkGLContexts</span></a> are created for a <a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> using
<a class="link" href="gdk3-Windows.html#gdk-window-create-gl-context" title="gdk_window_create_gl_context ()"><code class="function">gdk_window_create_gl_context()</code></a>, and the context will match
the <a class="link" href="gdk3-Visuals.html#GdkVisual"><span class="type">GdkVisual</span></a> of the window.</p>
<p>A <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is not tied to any particular normal framebuffer.
For instance, it cannot draw to the <a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> back buffer. The GDK
repaint system is in full control of the painting to that. Instead,
you can create render buffers or textures and use <a class="link" href="gdk3-Cairo-Interaction.html#gdk-cairo-draw-from-gl" title="gdk_cairo_draw_from_gl ()"><code class="function">gdk_cairo_draw_from_gl()</code></a>
in the draw function of your widget to draw them. Then GDK will handle
the integration of your rendering with that of other widgets.</p>
<p>Support for <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is platform-specific, context creation
can fail, returning <code class="literal">NULL</code> context.</p>
<p>A <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> has to be made "current" in order to start using
it, otherwise any OpenGL call will be ignored.</p>
<div class="refsect3">
<a name="id-1.2.19.8.7"></a><h4>Creating a new OpenGL context</h4>
<p>In order to create a new <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> instance you need a
<a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a>, which you typically get during the realize call
of a widget.</p>
<p>A <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is not realized until either <a class="link" href="GdkGLContext.html#gdk-gl-context-make-current" title="gdk_gl_context_make_current ()"><code class="function">gdk_gl_context_make_current()</code></a>,
or until it is realized using <a class="link" href="GdkGLContext.html#gdk-gl-context-realize" title="gdk_gl_context_realize ()"><code class="function">gdk_gl_context_realize()</code></a>. It is possible to
specify details of the GL context like the OpenGL version to be used, or
whether the GL context should have extra state validation enabled after
calling <a class="link" href="gdk3-Windows.html#gdk-window-create-gl-context" title="gdk_window_create_gl_context ()"><code class="function">gdk_window_create_gl_context()</code></a> by calling <a class="link" href="GdkGLContext.html#gdk-gl-context-realize" title="gdk_gl_context_realize ()"><code class="function">gdk_gl_context_realize()</code></a>.
If the realization fails you have the option to change the settings of the
<a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> and try again.</p>
</div>
<div class="refsect3">
<a name="id-1.2.19.8.8"></a><h4>Using a GdkGLContext</h4>
<p>You will need to make the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> the current context
before issuing OpenGL calls; the system sends OpenGL commands to
whichever context is current. It is possible to have multiple
contexts, so you always need to ensure that the one which you
want to draw with is the current one before issuing commands:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="n">gdk_gl_context_make_current</span> <span class="p">(</span><span class="n">context</span><span class="p">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>You can now perform your drawing using OpenGL commands.</p>
<p>You can check which <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is the current one by using
<a class="link" href="GdkGLContext.html#gdk-gl-context-get-current" title="gdk_gl_context_get_current ()"><code class="function">gdk_gl_context_get_current()</code></a>; you can also unset any <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>
that is currently set by calling <a class="link" href="GdkGLContext.html#gdk-gl-context-clear-current" title="gdk_gl_context_clear_current ()"><code class="function">gdk_gl_context_clear_current()</code></a>.</p>
</div>
</div>
<div class="refsect1">
<a name="GdkGLContext.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gdk-gl-context-get-display"></a><h3>gdk_gl_context_get_display ()</h3>
<pre class="programlisting"><a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="returnvalue">GdkDisplay</span></a> *
gdk_gl_context_get_display (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Retrieves the <a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="type">GdkDisplay</span></a> the <em class="parameter"><code>context</code></em>
 is created for</p>
<div class="refsect3">
<a name="gdk-gl-context-get-display.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-get-display.returns"></a><h4>Returns</h4>
<p>a <a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="type">GdkDisplay</span></a> or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-window"></a><h3>gdk_gl_context_get_window ()</h3>
<pre class="programlisting"><a class="link" href="gdk3-Windows.html#GdkWindow"><span class="returnvalue">GdkWindow</span></a> *
gdk_gl_context_get_window (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Retrieves the <a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> used by the <em class="parameter"><code>context</code></em>
.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-window.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-get-window.returns"></a><h4>Returns</h4>
<p>a <a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-shared-context"></a><h3>gdk_gl_context_get_shared_context ()</h3>
<pre class="programlisting"><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="returnvalue">GdkGLContext</span></a> *
gdk_gl_context_get_shared_context (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Retrieves the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> that this <em class="parameter"><code>context</code></em>
 share data with.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-shared-context.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-get-shared-context.returns"></a><h4>Returns</h4>
<p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-version"></a><h3>gdk_gl_context_get_version ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_get_version (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                            <em class="parameter"><code><span class="type">int</span> *major</code></em>,
                            <em class="parameter"><code><span class="type">int</span> *minor</code></em>);</pre>
<p>Retrieves the OpenGL version of the <em class="parameter"><code>context</code></em>
.</p>
<p>The <em class="parameter"><code>context</code></em>
 must be realized prior to calling this function.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-version.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>major</p></td>
<td class="parameter_description"><p>return location for the major version. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>minor</p></td>
<td class="parameter_description"><p>return location for the minor version. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-set-required-version"></a><h3>gdk_gl_context_set_required_version ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_set_required_version (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                                     <em class="parameter"><code><span class="type">int</span> major</code></em>,
                                     <em class="parameter"><code><span class="type">int</span> minor</code></em>);</pre>
<p>Sets the major and minor version of OpenGL to request.</p>
<p>Setting <em class="parameter"><code>major</code></em>
 and <em class="parameter"><code>minor</code></em>
 to zero will use the default values.</p>
<p>The <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> must not be realized or made current prior to calling
this function.</p>
<div class="refsect3">
<a name="gdk-gl-context-set-required-version.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>major</p></td>
<td class="parameter_description"><p>the major version to request</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>minor</p></td>
<td class="parameter_description"><p>the minor version to request</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-required-version"></a><h3>gdk_gl_context_get_required_version ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_get_required_version (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                                     <em class="parameter"><code><span class="type">int</span> *major</code></em>,
                                     <em class="parameter"><code><span class="type">int</span> *minor</code></em>);</pre>
<p>Retrieves the major and minor version requested by calling
<a class="link" href="GdkGLContext.html#gdk-gl-context-set-required-version" title="gdk_gl_context_set_required_version ()"><code class="function">gdk_gl_context_set_required_version()</code></a>.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-required-version.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>major</p></td>
<td class="parameter_description"><p>return location for the major version to request. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>minor</p></td>
<td class="parameter_description"><p>return location for the minor version to request. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-set-debug-enabled"></a><h3>gdk_gl_context_set_debug_enabled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_set_debug_enabled (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                                  <em class="parameter"><code><span class="type">gboolean</span> enabled</code></em>);</pre>
<p>Sets whether the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> should perform extra validations and
run time checking. This is useful during development, but has
additional overhead.</p>
<p>The <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> must not be realized or made current prior to
calling this function.</p>
<div class="refsect3">
<a name="gdk-gl-context-set-debug-enabled.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>enabled</p></td>
<td class="parameter_description"><p>whether to enable debugging in the context</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-debug-enabled"></a><h3>gdk_gl_context_get_debug_enabled ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gdk_gl_context_get_debug_enabled (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Retrieves the value set using <a class="link" href="GdkGLContext.html#gdk-gl-context-set-debug-enabled" title="gdk_gl_context_set_debug_enabled ()"><code class="function">gdk_gl_context_set_debug_enabled()</code></a>.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-debug-enabled.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-get-debug-enabled.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if debugging is enabled</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-set-forward-compatible"></a><h3>gdk_gl_context_set_forward_compatible ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_set_forward_compatible (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                                       <em class="parameter"><code><span class="type">gboolean</span> compatible</code></em>);</pre>
<p>Sets whether the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> should be forward compatible.</p>
<p>Forward compatibile contexts must not support OpenGL functionality that
has been marked as deprecated in the requested version; non-forward
compatible contexts, on the other hand, must support both deprecated and
non deprecated functionality.</p>
<p>The <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> must not be realized or made current prior to calling
this function.</p>
<div class="refsect3">
<a name="gdk-gl-context-set-forward-compatible.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>compatible</p></td>
<td class="parameter_description"><p>whether the context should be forward compatible</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-forward-compatible"></a><h3>gdk_gl_context_get_forward_compatible ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gdk_gl_context_get_forward_compatible (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Retrieves the value set using <a class="link" href="GdkGLContext.html#gdk-gl-context-set-forward-compatible" title="gdk_gl_context_set_forward_compatible ()"><code class="function">gdk_gl_context_set_forward_compatible()</code></a>.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-forward-compatible.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-get-forward-compatible.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the context should be forward compatible</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-set-use-es"></a><h3>gdk_gl_context_set_use_es ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_set_use_es (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                           <em class="parameter"><code><span class="type">int</span> use_es</code></em>);</pre>
<p>Requests that GDK create a OpenGL ES context instead of an OpenGL one,
if the platform and windowing system allows it.</p>
<p>The <em class="parameter"><code>context</code></em>
 must not have been realized.</p>
<p>By default, GDK will attempt to automatically detect whether the
underlying GL implementation is OpenGL or OpenGL ES once the <em class="parameter"><code>context</code></em>

is realized.</p>
<p>You should check the return value of <a class="link" href="GdkGLContext.html#gdk-gl-context-get-use-es" title="gdk_gl_context_get_use_es ()"><code class="function">gdk_gl_context_get_use_es()</code></a> after
calling <a class="link" href="GdkGLContext.html#gdk-gl-context-realize" title="gdk_gl_context_realize ()"><code class="function">gdk_gl_context_realize()</code></a> to decide whether to use the OpenGL or
OpenGL ES API, extensions, or shaders.</p>
<div class="refsect3">
<a name="gdk-gl-context-set-use-es.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>:</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>use_es</p></td>
<td class="parameter_description"><p>whether the context should use OpenGL ES instead of OpenGL,
or -1 to allow auto-detection</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-22.html#api-index-3.22">3.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-use-es"></a><h3>gdk_gl_context_get_use_es ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gdk_gl_context_get_use_es (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Checks whether the <em class="parameter"><code>context</code></em>
 is using an OpenGL or OpenGL ES profile.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-use-es.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-get-use-es.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is using an OpenGL ES profile</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-22.html#api-index-3.22">3.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-is-legacy"></a><h3>gdk_gl_context_is_legacy ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gdk_gl_context_is_legacy (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Whether the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> is in legacy mode or not.</p>
<p>The <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> must be realized before calling this function.</p>
<p>When realizing a GL context, GDK will try to use the OpenGL 3.2 core
profile; this profile removes all the OpenGL API that was deprecated
prior to the 3.2 version of the specification. If the realization is
successful, this function will return <code class="literal">FALSE</code>.</p>
<p>If the underlying OpenGL implementation does not support core profiles,
GDK will fall back to a pre-3.2 compatibility profile, and this function
will return <code class="literal">TRUE</code>.</p>
<p>You can use the value returned by this function to decide which kind
of OpenGL API to use, or whether to do extension discovery, or what
kind of shader programs to load.</p>
<div class="refsect3">
<a name="gdk-gl-context-is-legacy.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-is-legacy.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the GL context is in legacy mode</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-20.html#api-index-3.20">3.20</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-realize"></a><h3>gdk_gl_context_realize ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gdk_gl_context_realize (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>,
                        <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Realizes the given <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>.</p>
<p>It is safe to call this function on a realized <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>.</p>
<div class="refsect3">
<a name="gdk-gl-context-realize.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>return location for a <span class="type">GError</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gdk-gl-context-realize.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the context is realized</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-make-current"></a><h3>gdk_gl_context_make_current ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_make_current (<em class="parameter"><code><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *context</code></em>);</pre>
<p>Makes the <em class="parameter"><code>context</code></em>
 the current one.</p>
<div class="refsect3">
<a name="gdk-gl-context-make-current.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-get-current"></a><h3>gdk_gl_context_get_current ()</h3>
<pre class="programlisting"><a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="returnvalue">GdkGLContext</span></a> *
gdk_gl_context_get_current (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Retrieves the current <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>.</p>
<div class="refsect3">
<a name="gdk-gl-context-get-current.returns"></a><h4>Returns</h4>
<p>the current <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>, or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>]</span></p>
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<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-gl-context-clear-current"></a><h3>gdk_gl_context_clear_current ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gdk_gl_context_clear_current (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Clears the current <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>.</p>
<p>Any OpenGL call after this function returns will be ignored
until <a class="link" href="GdkGLContext.html#gdk-gl-context-make-current" title="gdk_gl_context_make_current ()"><code class="function">gdk_gl_context_make_current()</code></a> is called.</p>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
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<div class="refsect1">
<a name="GdkGLContext.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GdkGLContext-struct"></a><h3>GdkGLContext</h3>
<pre class="programlisting">typedef struct _GdkGLContext GdkGLContext;</pre>
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<hr>
<div class="refsect2">
<a name="GdkGLError"></a><h3>enum GdkGLError</h3>
<p>Error enumeration for <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>.</p>
<div class="refsect3">
<a name="GdkGLError.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
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<tr>
<td class="enum_member_name"><p><a name="GDK-GL-ERROR-NOT-AVAILABLE:CAPS"></a>GDK_GL_ERROR_NOT_AVAILABLE</p></td>
<td class="enum_member_description">
<p>OpenGL support is not available</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GDK-GL-ERROR-UNSUPPORTED-FORMAT:CAPS"></a>GDK_GL_ERROR_UNSUPPORTED_FORMAT</p></td>
<td class="enum_member_description">
<p>The requested visual format is not supported</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GDK-GL-ERROR-UNSUPPORTED-PROFILE:CAPS"></a>GDK_GL_ERROR_UNSUPPORTED_PROFILE</p></td>
<td class="enum_member_description">
<p>The requested profile is not supported</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
</div>
<div class="refsect1">
<a name="GdkGLContext.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GdkGLContext--display"></a><h3>The <code class="literal">“display”</code> property</h3>
<pre class="programlisting">  “display”                  <a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="type">GdkDisplay</span></a> *</pre>
<p>The <a class="link" href="GdkDisplay.html" title="GdkDisplay"><span class="type">GdkDisplay</span></a> used to create the <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a>.</p>
<p>Owner: GdkGLContext</p>
<p>Flags: Read / Write / Construct Only</p>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
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<hr>
<div class="refsect2">
<a name="GdkGLContext--shared-context"></a><h3>The <code class="literal">“shared-context”</code> property</h3>
<pre class="programlisting">  “shared-context”           <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> *</pre>
<p>The <a class="link" href="GdkGLContext.html" title="GdkGLContext"><span class="type">GdkGLContext</span></a> that this context is sharing data with, or <code class="literal">NULL</code></p>
<p>Owner: GdkGLContext</p>
<p>Flags: Read / Write / Construct Only</p>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GdkGLContext--window"></a><h3>The <code class="literal">“window”</code> property</h3>
<pre class="programlisting">  “window”                   <a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> *</pre>
<p>The <a class="link" href="gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> the gl context is bound to.</p>
<p>Owner: GdkGLContext</p>
<p>Flags: Read / Write / Construct Only</p>
<p class="since">Since: <a class="link" href="api-index-3-16.html#api-index-3.16">3.16</a></p>
</div>
</div>
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